Reissued



G. A. HUMASON.

PUMP- APPLICATIQN FILED 00T. Il, ISIS.

Patented Dec. 23, 1919.

GRAN VILLE. A. HU MA50N,-3wuawloz GRANVILLE A. HUMASON, 0F HOUSTON, TEXAS.

Speuication of Letters Patent.

Patented Dee. 23, 191e.v

Application led October 11, 1919. Serial No. 330,060.

To all whom t may concern:

Be it known that I, GRANVILLE A. HUMA- soN, a citizen of the United States, residing at Houston, Texas, have invented a certain new and useful Improvement in Pumps, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to 'an im rovement in pumps for use in pumping oi or water or similar fluids from deep wells. It relates more specifically to the pumping of iiuids which are filled with sand or other sediment or are sticky and viscous and do not ow freely so as to be easily discharged from the outlet pipe on the operation of the pump, but which become lodged therein and fail to iow.

One object of my invention is to providea pump with means to assist the action of the pum in forcing the Huid upwardly through t e discharge pipe and maintain a free flow therefrom at all times. Another object is to provide an apparatus of the character described wherein the sucker rod and piston used in the operation of the pump may be forced free of material which may be lodged therein at any time, either during the operation of the pump, or when thepump is at rest.

Referring to the drawing forming a part of this s ecication, and wherein ike n umerals o reference are applied to like parts throughout the several views, Figure 1 is a central 'longitudinal section through the main working parts of my 'improved punp;

Fig 2 is a transverse section taken on plane 2-2 of Fig. 1; Fig. 3 is a Vbroken section through the working barrel of my pump showing the piston in elevation.

My invention comprises a modification of an ordinary pump by means acting to force a discharge of some freely liowing fluid upwardly through the outlet discharge pipe of the pump, said discharge of fluid being actuated moreor less automaticall by the operation of the other parts.. he type of pump used employs an ordinary pump piston, such as is now used in deep wells, and has a discharge for the iiuidbeing pumped through the sucker rod connected with the piston.- As an additional means of performing the pumpin operation a fluid may be forced downwardy outside of the sucker rod and through a passage in the upper part of the piston so as to discharge a flushing iiuid upwardly into the sucker rod and assist 1n carrying away the fluid being pumped.

Referring to the drawing, I have represented my piston as working within a working barrel l of ordinary construction, havlng at its upper end a cap 3 which is connected with the working barrel by means of a coupling mem'ber 4. The cap 3 is adapted to seal the upper end of the working barrel and is provided with a stuiling box 5 through which the sucker rod 6, connected with the plunger, is adapted to reciprocate. Threaded within the coupling member 4, which connects the working barrel with the ca 3, is an annular disk or diaphragm 7. his diaphragm has a central opening 8 through which the sucker rod may operate and is provided with a plurality of smaller longitudinal openings 9, which are controlled by a ball valve 10 held upwardly within the seat 11 by a helical spring 12. There are three of these valve-controlled passages, as shown in Fig. 2, but I do not wish to be confined to anyf'particular number, the purpose being to provide suiiicient openin for a free downward flow of flushing fluid rom the upper end of the working barrel. The cap 3 may also be providedwith a lateral opening into which is threaded a connecting pipe 13 leading to the atmosphere or to a source of fluid under pressure, such as steam or compressed air or water.

The piston employed in connection with this pump is not, in its generalconstruction, new in the art. It has an upper section 14 fixed upon a central pipe 15 threaded upon the sucker rod 6. This upper. section is formed with a grooved upper surface, so formed as to provide a shar upper edge 16 adjacent the working barre within which it fits snugly, for the purpose of scraping the working barrel free of sediment, which might act to work down between the plunger and the working barrel. There are separate additional sections 17, 18 and 19 below the upper section 14, each of these sections being spaced from the adjacent one by means of a llexible washer or cu 20, normal] heut upwardly at the outer adige so as to crm a lol ti ht fit between the plunger and. the sides of the workin barrel in operation. The lower end of t e pipe 15 is threaded at. 21 and provided with aspecial nut 22 havin a lower wrench hold 23 for the purpose o operation. This nut serves to clamp the cups and the sections, between which they are placed, tightly between the said nut and the upper section 14. The channel through the interior of the pipe 15 is closed normally by an upwardly opening ball valve 24 fitting within a seat 25.

In order to deliver a dischar e of lifting iuid upwardly within thesuc er rod` and thereby carry with it any material which may become lod ed within the said sucker rod, I have provided a discharge opening 26 which opens upwardly within the pi e 15 adjacent the upper end of the piston. luid may be discharged into this outlet through a plurality of passages 27, leading from the up er end of the piston downwardly in .an inc ined direction to connect with the transverse pipe 28 within the central channel of the piston. Thus iiuid forcedv downwardly through the passages 27 and 28 will be discharged upwardly through the outlet 26,

past an upwardly opening ball valve 29. in

the.. sucker rod, thereby serving to assist in lifting the iiuid to the surface and in makin the same more mobile. The ball valve 29 is prevented from being removed from its position by a valvel cage 30 of ordinary construction.

The operation of m pum will now be clearly understood. e wor g barrel is, of course, understood to have the usual foot valve and other arts usually connected with the pump and t e downward stroke of the piston will serve to `:force the fluid being pumped upwardly past the valve 24 and also pasty the discharge means 26 and through the sucker rod yto the surface. Very often the Huid is so mixed withvasphaltic material or with paran and other viscous materials that the working of the iston will not exert suicient pressure to orce the fluid upwardly through the sucker rod. Therefore, in the operation of m pump, I have provided that, under or inary circumstances,

. air will find entrance through the inlet pipe l through the diaphr 13 and downwardly past'the valves 10 into the space between the piston and the diaphragm 4. Thus the downward stroke' of the piston will serve to drawY air inwardly to fill the said space. The upward stroke, owever, will 'close the valves 10 within the diaphragm and the compression of the air within the space will cause a iow of the air throu h the passages 27 and out through the disc arge outlet 26 into the sucker rod with a-strong upward impetus, thus acting in the nature of an air lift pump to assist in the raising of the iuid to the surface.

When'fthe material bein pumped is especially viscous because of ie parain or asphaltic materials, it may be best to discharge through the pipe 13, into ythe space above the piston, a strong pressure of live steam. This steam will serve to warm the material within the sucker rod and will also exert a strong pressure upwardly through the sucker rod in the manner described and thus serve to prevent the lod ing of material within the outlet pipe. t is obvious that either hot or cold water or other fluid may be also used in this connection. It is also possible to stop the pump and toilush the iston and suc er rod clear of al1A material y means of pumping in, through the connesting pipe 13, a supply of steam or water sufficient to clean the apparatus. It is to be noted that the operation of the flushing device is ractically automatic the reciprocation oit e piston being suiiieient to draw the flushing material past the valve 10 in the diaphragm and to fill the space above the piston so that when the said material is compressed it will force its way upwardly through the sucker rod.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. In a ump, a workin barrel, a piston recprocab e therein, a hol o w sucker rod on sai piston, a valve controlled diaphragm above said piston, said piston having means to discharge a lushiii fluid upwardly through said sucker rod y the operation of said iston.

2. n a pump, a working barrel, a diaphragm closing the up er end of said work-y in barrel, downward opening valves in said diaphragm, a Sucher rod reciprocable through said diaphragm, a piston on said sucker rod, and means operated by the reciprocation of said piston to discharge an upwsrd j etof flushing fluid within said sucker ro 3. In a ump, a workin barrel, a piston reciprocab e therein, a suc er rod connected therewith, a assage thrc rh said piston and said suclser rod for t e fluid being pumped and means actuated by said piston to force a jet ofl flushing fluid upwardly throiugih said sucker rod for the purpose de` scrib 4. In a ump, a working barrel, a piston therein, a4 ollow sucker rod connected therewith, said piston being hollow and providing with said sucker rod, an upward passage for the iuid being pumped, said piston also having passages connecting the space above said piston with said sucker rod, a diaphragm in said .working barrel above said piston whereby the reciprocation of said piston will cause a discharge of fluid through said passages into said sucker rod.

5. n a pump, a working barrel, a piston reciprocable therein, a. sucker 'rod on said piston, the upper end of said working barrel bein closed, an inlet pipe connected therewit a valve controlled dla hran adjacent the upper end of said worging arrel, and means in said piston whereby a discharge of Huid through said inlet pipe and signature, this the 8 day of October, A. D.

GRANVILLE A. HUMASON. 

